Critical Path Method Flashcards
Planning
What is Critical Path?
The sequence of activities that represents the longest duration path through a project, which determines the minimum project duration.
What is Critical Chain Method?
Uses buffers to account for limited resources and project uncertainties.
What is Free Float?
The amount of time an activity can be delayed without delaying the Early Start of the successor activity.
What is Total Float?
The amount of time an activity can be delayed without delaying the project completion date.
What is Project Float?
The amount of time an activity can be delayed without impacting an externally imposed project deadline set by the customer or management.
How is Early Start (ES) calculated?
By determining the latest EF of the predecessor tasks plus 1.
How is Early Finish (EF) calculated?
By adding the duration to the ES and subtracting 1.
How is Late Start (LS) calculated?
By subtracting the duration from the LF and adding 1
How is Late Finish (LF) calculated?
By determining the earliest LS of the Successor tasks minus 1.
What are the 2 Forward Pass Rules for Critical Path?
1) Early Finish (EF) is determined by adding the duration to the Early Start (ES) and subtracting 1 ((ES + Duration) - 1), 2) ES of successor task is equal to the latest EF of the predecessor task plus 1 (Largest EF between two) + 1
What are the 2 Backward Pass Rules for Critical Pass?
1) Latest Start (LS) is determined by subtracting the duration to the Latest Finish (LF) and adding 1 ((LS - Duration) + 1) 2) LF of predecessor task is equal to the earliest LS of the successor task minus 1 ( (LF -Duration) + 1
What are the float rules to Critical Path (LF - EF)?
1) Critical Path is the chain of paths which have a 0 float, 2) Critical Path is the longest duration path through the network. Any delays along the critical path will delay the project. 3) The paths that have float can be delayed by the amount of the float and not delay the succor tasks or the project.
